CVE-2026-9477

CRITICAL

Totolink A8000RU Web Management cstecgi.cgi setAccessDeviceCfg os command injection

Title source: cna

Description

A security flaw has been discovered in Totolink A8000RU 7.1cu.643_b20200521. This issue affects the function setAccessDeviceCfg of the file /cgi-bin/cstecgi.cgi of the component Web Management Interface. Performing a manipulation of the argument mac results in os command injection. The attack is possible to be carried out remotely. The exploit has been released to the public and may be used for attacks.

References (5)

Core 5

Core References

Vdb Entry, Technical Description vdb-entry technical-description

VDB-365458 | Totolink A8000RU Web Management cstecgi.cgi setAccessDeviceCfg os command injection

https://vuldb.com/vuln/365458

Signature, Permissions Required signature permissions-required

VDB-365458 | CTI Indicators (IOB, IOC, TTP, IOA)

https://vuldb.com/vuln/365458/cti

Third Party Advisory third-party-advisory

Submit #813460 | Totolink A8000RU 7.1cu.643_b20200521 Command Injection

https://vuldb.com/submit/813460

Exploit exploit

https://github.com/Litengzheng/vuldb_new2/blob/main/A8000RU/vul_349/README.md

View Exploit ZIP pw:eip

Product product

https://www.totolink.net/

Scores

CVSS v3 9.8

EPSS 0.0191

EPSS Percentile 77.0%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment

Exploitation poc

Automatable yes

Technical Impact total

Details

CWE

CWE-77 CWE-78

Status published

Products (1)

Totolink/A8000RU 7.1cu.643_b20200521

Published May 25, 2026

Tracked Since May 25, 2026